Facebook pulled together a deep-dive of the top global and U.S. trends — the conversations — taking place on the social network. Bonus points to whoever can identify the above picture that accompanied Facebook’s infographic.

It also went hyper-personal, creating a customized Facebook “year in review” to show users their “top moments.” You can find yours here.

Interesting Fact: World-wide, the most talked about topic on Facebook was Pope Francis, Facebook says. But in the U.S., the Super Bowl was tops; the pontiff came in sixth.

The year’s most retweeted tweet came from “Glee” star Lea Michele. The tweet, her first public comment about the death of her co-star and boyfriend, Cory Monteith, was retweeted 408,266 times at its peak, according to Twitter. (Twitter’s retweet counts can drop if people undo their retweets.)

Sixty percent of Instagrammers shared photos from outside the U.S. With that in mind, the Facebook-owned app tallied not only the most-Instagrammed locations of 2013 but also the most Instagrammed cities.

Interesting Fact: The most Instagrammed spot of 2013: The Siam Paragon, a huge shopping mall in Bangkok. The most Instagrammed city: New York.

Foursquare looked at more than 4.5 billion check-ins and 30 million tips to bring users the “most awesome places in cities around the world.” There are “Best of Foursquare” lists for 30 cities, including Denver, Los Angeles, Tokyo and Moscow.

Yahoo’s Tumblr analyzed “millions of blogs, billions of posts, and zillions of notes” to find its top performing blogs. Everything from reblogged posts on K-pop groups to the top posts on (of course) food made the cut.

Interesting Fact: Want to feel like you’re walking down a Home Depot paint aisle? The “Prettiest Colors” Tumblr lists dozens of HTML web colors. (The numbers that read #d0c5ec or #fe8567.)

There was no avoiding it: The top trending video on Google’s YouTube was Ylvis’s “The Fox.” People hit the play button more than 275 million times to find out what he said. You can find the others here.